From: Chris Riling (criling@gmail.com)
Date: Wed Nov 21 2007 - 03:47:19 ART
I believe "sh ip bgp rib-failure" will give you some information on your
particular case...
Chris
On Nov 21, 2007 12:48 AM, Mohamed, Liban [NTK] <Liban.Mohamed@sprint.com>
wrote:
> Vignesh,
>
> When BGP tries to install the bestpath prefix into Routing Information
> Base (RIB) (for example, the IP Routing table), RIB might reject the BGP
> route due to any of these reasons:
>
> * Route with better administrative distance already present in IGP.
> For example, if a static route already exists in IP Routing table.
> * Memory failure.
> * The number of routes in VPN routing/forwarding (VRF) exceeds the
> route-limit configured under the VRF instance.
>
> In such cases, the prefixes that are rejected for these reasons are
> identified by r RIB Failure in the show ip bgp command output and are
> not advertised to the peers. This feature was first made available in
> Cisco IOS Software Release 12.2(08.05)T.
>
> So in your case you have better admin, hence you can ping, I don't think
> you need to be concern on this.
>
>
> Thanks,
>
> Liban Mohamed
> NTAC-IP
> Sprint/Nextel
> www.sprint.net
> liban.mohamed@sprint.com
> (W) 678-291-3438
> (PCS) 404-441-9701
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> vignesh sethuraman
> Sent: Wednesday, November 21, 2007 12:15 AM
> To: ccielab@groupstudy.com
> Subject: RIB-failure
>
> Hello,
>
> When i view the bgp table, am seeing RIB-failure in the output. But I
> am able to ping the address. could you please any 1 explain what is
> possible cause for this
>
> Sh ip bgp
>
> r> 152.1.125.0/24 152.1.123.1 0 100 0 (1000) i
> r 152.1.123.2 0 100 0
> (2000) i
> r> 204.12.1.0 152.1.37.7 0 100 0 (7000) i
>
> For eg:
>
> Rack1R3#sh ip bgp 152.1.125.0
> BGP routing table entry for 152.1.125.0/24, version 12
> Paths: (2 available, best #1, table Default-IP-Routing-Table,
> RIB-failure(17))
> Advertised to update-groups:
> 1 2
> (1000)
> 152.1.123.1 (metric 781) from 152.1.123.1 (150.1.1.1)
> Origin IGP, metric 0, localpref 100, valid, confed-external, best
> (2000)
> 152.1.123.2 (metric 781) from 152.1.123.2 (150.1.2.2)
> Origin IGP, metric 0, localpref 100, valid, confed-external
>
>
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